/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

#ifndef UV_WIN_HANDLE_INL_H_
#define UV_WIN_HANDLE_INL_H_

#include <assert.h>
#include <io.h>

#include "uv.h"
#include "internal.h"

#define DECREASE_ACTIVE_COUNT(loop, handle)                                          \
    do {                                                                             \
        if (--(handle)->activecnt == 0 && !((handle)->flags & UV__HANDLE_CLOSING)) { \
            uv__handle_stop((handle));                                               \
        }                                                                            \
        assert((handle)->activecnt >= 0);                                            \
    } while (0)

#define INCREASE_ACTIVE_COUNT(loop, handle) \
    do {                                    \
        if ((handle)->activecnt++ == 0) {   \
            uv__handle_start((handle));     \
        }                                   \
        assert((handle)->activecnt > 0);    \
    } while (0)

#define DECREASE_PENDING_REQ_COUNT(handle)                                     \
    do {                                                                       \
        assert(handle->reqs_pending > 0);                                      \
        handle->reqs_pending--;                                                \
                                                                               \
        if (handle->flags & UV__HANDLE_CLOSING && handle->reqs_pending == 0) { \
            uv_want_endgame(loop, (uv_handle_t*)handle);                       \
        }                                                                      \
    } while (0)

#define uv__handle_closing(handle)                                                          \
    do {                                                                                    \
        assert(!((handle)->flags & UV__HANDLE_CLOSING));                                    \
                                                                                            \
        if (!(((handle)->flags & UV__HANDLE_ACTIVE) && ((handle)->flags & UV__HANDLE_REF))) \
            uv__active_handle_add((uv_handle_t*)(handle));                                  \
                                                                                            \
        (handle)->flags |= UV__HANDLE_CLOSING;                                              \
        (handle)->flags &= ~UV__HANDLE_ACTIVE;                                              \
    } while (0)

#define uv__handle_close(handle)                        \
    do {                                                \
        QUEUE_REMOVE(&(handle)->handle_queue);          \
        uv__active_handle_rm((uv_handle_t*)(handle));   \
                                                        \
        (handle)->flags |= UV_HANDLE_CLOSED;            \
                                                        \
        if ((handle)->close_cb)                         \
            (handle)->close_cb((uv_handle_t*)(handle)); \
    } while (0)

INLINE static void uv_want_endgame(uv_loop_t* loop, uv_handle_t* handle)
{
    if (!(handle->flags & UV_HANDLE_ENDGAME_QUEUED)) {
        handle->flags |= UV_HANDLE_ENDGAME_QUEUED;

        handle->endgame_next = loop->endgame_handles;
        loop->endgame_handles = handle;
    }
}

INLINE static void uv_process_endgames(uv_loop_t* loop)
{
    uv_handle_t* handle;

    while (loop->endgame_handles) {
        handle = loop->endgame_handles;
        loop->endgame_handles = handle->endgame_next;

        handle->flags &= ~UV_HANDLE_ENDGAME_QUEUED;

        switch (handle->type) {
        case UV_TCP:
            uv_tcp_endgame(loop, (uv_tcp_t*)handle);
            break;

        case UV_NAMED_PIPE:
            uv_pipe_endgame(loop, (uv_pipe_t*)handle);
            break;
            //zero
            //      case UV_TTY:
            //        uv_tty_endgame(loop, (uv_tty_t*) handle);
            //        break;

        case UV_UDP:
            uv_udp_endgame(loop, (uv_udp_t*)handle);
            break;

        case UV_POLL:
            uv_poll_endgame(loop, (uv_poll_t*)handle);
            break;

        case UV_TIMER:
            uv_timer_endgame(loop, (uv_timer_t*)handle);
            break;

        case UV_PREPARE:
        case UV_CHECK:
        case UV_IDLE:
            uv_loop_watcher_endgame(loop, handle);
            break;

        case UV_ASYNC:
            uv_async_endgame(loop, (uv_async_t*)handle);
            break;

        case UV_SIGNAL:
            uv_signal_endgame(loop, (uv_signal_t*)handle);
            break;

        case UV_PROCESS:
            uv_process_endgame(loop, (uv_process_t*)handle);
            break;

        case UV_FS_EVENT:
            uv_fs_event_endgame(loop, (uv_fs_event_t*)handle);
            break;

        case UV_FS_POLL:
            uv__fs_poll_endgame(loop, (uv_fs_poll_t*)handle);
            break;

        default:
            assert(0);
            break;
        }
    }
}

INLINE static HANDLE uv__get_osfhandle(int fd)
{
    /* _get_osfhandle() raises an assert in debug builds if the FD is invalid. */
    /* But  it also correctly checks the FD and returns INVALID_HANDLE_VALUE */
    /* for invalid FDs in release builds (or if you let the assert continue).  */
    /* So this wrapper function disables asserts when calling _get_osfhandle. */

    HANDLE handle;
    UV_BEGIN_DISABLE_CRT_ASSERT();
    handle = (HANDLE)_get_osfhandle(fd);
    UV_END_DISABLE_CRT_ASSERT();
    return handle;
}

#endif /* UV_WIN_HANDLE_INL_H_ */
